Correct at the mo you can push a car off on the last corner, finish above them and not be penalised basically. This is the problem some of us are seeing . A slight accidental bump is fine, smashing into a car with no braking, the intention being to send them of the track isn't.Didn't happen to me, but is useless suggesting harsher penalties as many times, if it isn't a huge crash, the driver who taps from behind isn't even penalized...
Yesterday I was the one who tapped from behind on the Clio race at Yamagiwa. It was unintentional but it send the other player off track.
I waited for him to take the position from me, but I didn't get any penalty, when I realize it would be fair to be penalized, despite no intention, has it "ruined" the other players' race.
If it happened in the last corner, probably I wouldn't be penalized also...